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Evaluation of Mechanical Loads on an Osseointegrated Implant During Locomotor Activities of Daily Living
Individuals with lower extremity amputations (ILEA) experience decreased functionality and quality of life due to their missing limb and tissue, with the method of prosthesis attachment largely influencing the quality of life of the individual. Currently, there are two ways a prosthesis can be attached to the residual limb, either with a socket or a bone anchored or osseointegrated (OI) implant. While ILEA with OI prostheses currently represent only a small percentage of ILEA, research largely indicates that ILEA with a OI prosthesis have better overall functionality and performance across a variety of survey or clinical metrics when compared to a socket-based prosthesis, ostensibly due to the direct skeletal attachment created by the OI implant. Because of the functional and performance increase with an OI prosthesis, and the current clinical trials, it is likely that an increased number of ILEA will request and undergo the OI surgery as time passes. And while an OI prosthesis largely increases the quality of life and performance of the ILEA during day to day life due to the direct skeletal attachment of the prosthesis, it is equally likely that the direct skeletal attachment introduces unique biomechanical concerns and problems for the ILEA due to the high force and vibration which may be transferred directly to the residual limb from the prosthesis contact with the ground. Therefore, this project is investigating the force and vibration that is measured at the residual limb of an individual who has a transfemoral amputation that uses an OI prosthesis to during activities of daily living to establish the potential for long term health problems.
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